Expands a dimension of the input tensor over multiple dimensions.
See also
torch.flatten()
the inverse of this function. It coalesces several dimensions into one.
input (Tensor) – the input tensor.
dim (int) – Dimension to be unflattened, specified as an index into input.shape
.
sizes (Tuple[int]) – New shape of the unflattened dimension. One of its elements can be -1 in which case the corresponding output dimension is inferred. Otherwise, the product of sizes
must equal input.shape[dim]
.
A View of input with the specified dimension unflattened.
>>> torch.unflatten(torch.randn(3, 4, 1), 1, (2, 2)).shape torch.Size([3, 2, 2, 1]) >>> torch.unflatten(torch.randn(3, 4, 1), 1, (-1, 2)).shape torch.Size([3, 2, 2, 1]) >>> torch.unflatten(torch.randn(5, 12, 3), -2, (2, 2, 3, 1, 1)).shape torch.Size([5, 2, 2, 3, 1, 1, 3])
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